﻿/*
 * File:        ColReorder.js
 * Version:     1.0.6
 * CVS:         $Id$
 * Description: Controls for column visiblity in DataTables
 * Author:      Allan Jardine (www.sprymedia.co.uk)
 * Created:     Wed Sep 15 18:23:29 BST 2010
 * Modified:    $Date$ by $Author$
 * Language:    Javascript
 * License:     GPL v2 or BSD 3 point style
 * Project:     DataTables
 * Contact:     www.sprymedia.co.uk/contact
 *
 * Copyright 2010-2011 Allan Jardine, all rights reserved.
 *
 * This source file is free software, under either the GPL v2 license or a
 * BSD style license, available at:
 *   http://datatables.net/license_gpl2
 *   http://datatables.net/license_bsd
 *
 */


(function($, window, document) {


/**
 * Switch the key value pairing of an index array to be value key (i.e. the old value is now the
 * key). For example consider [ 2, 0, 1 ] this would be returned as [ 1, 2, 0 ].
 *  @method  fnInvertKeyValues
 *  @param   array aIn Array to switch around
 *  @returns array
 */
function fnInvertKeyValues( aIn )
{
    var aRet=[];
    for ( var i=0, iLen=aIn.length ; i<iLen ; i++ )
    {
        aRet[ aIn[i] ] = i;
    }
    return aRet;
}


/**
 * Modify an array by switching the position of two elements
 *  @method  fnArraySwitch
 *  @param   array aArray Array to consider, will be modified by reference (i.e. no return)
 *  @param   int iFrom From point
 *  @param   int iTo Insert point
 *  @returns void
 */
function fnArraySwitch( aArray, iFrom, iTo )
{
    var mStore = aArray.splice( iFrom, 1 )[0];
    aArray.splice( iTo, 0, mStore );
}


/**
 * Switch the positions of nodes in a parent node (note this is specifically designed for
 * table rows). Note this function considers all element nodes under the parent!
 *  @method  fnDomSwitch
 *  @param   string sTag Tag to consider
 *  @param   int iFrom Element to move
 *  @param   int Point to element the element to (before this point), can be null for append
 *  @returns void
 */
function fnDomSwitch( nParent, iFrom, iTo )
{
    var anTags = [];
    for ( var i=0, iLen=nParent.childNodes.length ; i<iLen ; i++ )
    {
        if ( nParent.childNodes[i].nodeType == 1 )
        {
            anTags.push( nParent.childNodes[i] );
        }
    }
    var nStore = anTags[ iFrom ];
   
    if ( iTo !== null )
    {
        nParent.insertBefore( nStore, anTags[iTo] );
    }
    else
    {
        nParent.appendChild( nStore );
    }
}



/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * DataTables plug-in API functions
 *
 * This are required by ColReorder in order to perform the tasks required, and also keep this
 * code portable, to be used for other column reordering projects with DataTables, if needed.
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

	
	/**
	 * Plug-in for DataTables which will reorder the internal column structure by taking the column
	 * from one position (iFrom) and insert it into a given point (iTo).
	 *  @method  $.fn.dataTableExt.oApi.fnColReorder
	 *  @param   object oSettings DataTables settings object - automatically added by DataTables!
	 *  @param   int iFrom Take the column to be repositioned from this point
	 *  @param   int iTo and insert it into this point
	 *  @returns void
	 */
	$.fn.dataTableExt.oApi.fnColReorder = function ( oSettings, iFrom, iTo )
	{
	    var i, iLen, j, jLen, iCols=oSettings.aoColumns.length, nTrs, oCol;
	   
	    /* Sanity check in the input */
	    if ( iFrom == iTo )
	    {
	        /* Pointless reorder */
	        return;
	    }
	   
	    if ( iFrom < 0 || iFrom >= iCols )
	    {
	        this.oApi._fnLog( oSettings, 1, "ColReorder 'from' index is out of bounds: "+iFrom );
	        return;
	    }
	   
	    if ( iTo < 0 || iTo >= iCols )
	    {
	        this.oApi._fnLog( oSettings, 1, "ColReorder 'to' index is out of bounds: "+iTo );
	        return;
	    }
	   
	    /*
	     * Calculate the new column array index, so we have a mapping between the old and new
	     */
	    var aiMapping = [];
	    for ( i=0, iLen=iCols ; i<iLen ; i++ )
	    {
	        aiMapping[i] = i;
	    }
	    fnArraySwitch( aiMapping, iFrom, iTo );
	    var aiInvertMapping = fnInvertKeyValues( aiMapping );
	   
	   
	    /*
	     * Convert all internal indexing to the new column order indexes
	     */
	    /* Sorting */
	    for ( i=0, iLen=oSettings.aaSorting.length ; i<iLen ; i++ )
	    {
	        oSettings.aaSorting[i][0] = aiInvertMapping[ oSettings.aaSorting[i][0] ];
	    }
	   
	    /* Fixed sorting */
	    if ( oSettings.aaSortingFixed !== null )
	    {
	        for ( i=0, iLen=oSettings.aaSortingFixed.length ; i<iLen ; i++ )
	        {
	            oSettings.aaSortingFixed[i][0] = aiInvertMapping[ oSettings.aaSortingFixed[i][0] ];
	        }
	    }
	   
	    /* Data column sorting (the column which the sort for a given column should take place on) */
	    for ( i=0, iLen=iCols ; i<iLen ; i++ )
	    {
	        oCol = oSettings.aoColumns[i];
	        for ( j=0, jLen=oCol.aDataSort.length ; j<jLen ; j++ )
	        {
	            oCol.aDataSort[j] = aiInvertMapping[ oCol.aDataSort[j] ];
	        }
	    }
	   
	    /* Update the Get and Set functions for each column */
	    for ( i=0, iLen=iCols ; i<iLen ; i++ )
	    {
	        oCol = oSettings.aoColumns[i];
	        if ( typeof oCol.mDataProp == 'number' ) {
	            oCol.mDataProp = aiInvertMapping[ oCol.mDataProp ];
	            oCol.fnGetData = oSettings.oApi._fnGetObjectDataFn( oCol.mDataProp );
	            oCol.fnSetData = oSettings.oApi._fnSetObjectDataFn( oCol.mDataProp );
	        }
	    }
	   
	   
	    /*
	     * Move the DOM elements
	     */
	    if ( oSettings.aoColumns[iFrom].bVisible )
	    {
	        /* Calculate the current visible index and the point to insert the node before. The insert
	         * before needs to take into account that there might not be an element to insert before,
	         * in which case it will be null, and an appendChild should be used
	         */
	        var iVisibleIndex = this.oApi._fnColumnIndexToVisible( oSettings, iFrom );
	        var iInsertBeforeIndex = null;
	       
	        i = iTo < iFrom ? iTo : iTo + 1;
	        while ( iInsertBeforeIndex === null && i < iCols )
	        {
	            iInsertBeforeIndex = this.oApi._fnColumnIndexToVisible( oSettings, i );
	            i++;
	        }
	       
	        /* Header */
	        nTrs = oSettings.nTHead.getElementsByTagName('tr');
	        for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
	        {
	            fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
	        }
	       
	        /* Footer */
	        if ( oSettings.nTFoot !== null )
	        {
	            nTrs = oSettings.nTFoot.getElementsByTagName('tr');
	            for ( i=0, iLen=nTrs.length ; i<iLen ; i++ )
	            {
	                fnDomSwitch( nTrs[i], iVisibleIndex, iInsertBeforeIndex );
	            }
	        }
	       
	        /* Body */
	        for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
	        {
	            if ( oSettings.aoData[i].nTr !== null )
	            {
	                fnDomSwitch( oSettings.aoData[i].nTr, iVisibleIndex, iInsertBeforeIndex );
	            }
	        }
	    }
	   
	   
	    /*
	     * Move the internal array elements
	     */
	    /* Columns */
	    fnArraySwitch( oSettings.aoColumns, iFrom, iTo );
	   
	    /* Search columns */
	    fnArraySwitch( oSettings.aoPreSearchCols, iFrom, iTo );
	   
	    /* Array array - internal data anodes cache */
	    for ( i=0, iLen=oSettings.aoData.length ; i<iLen ; i++ )
	    {
	        if ( $.isArray( oSettings.aoData[i]._aData ) ) {
	          fnArraySwitch( oSettings.aoData[i]._aData, iFrom, iTo );
	        }
	        fnArraySwitch( oSettings.aoData[i]._anHidden, iFrom, iTo );
	    }
	   
	    /* Reposition the header elements in the header layout array */
	    for ( i=0, iLen=oSettings.aoHeader.length ; i<iLen ; i++ )
	    {
	        fnArraySwitch( oSettings.aoHeader[i], iFrom, iTo );
	    }
	   
	    if ( oSettings.aoFooter !== null )
	    {
	        for ( i=0, iLen=oSettings.aoFooter.length ; i<iLen ; i++ )
	        {
	            fnArraySwitch( oSettings.aoFooter[i], iFrom, iTo );
	        }
	    }
	   
	   
	    /*
	     * Update DataTables' event handlers
	     */
	   
	    /* Sort listener */
	    for ( i=0, iLen=iCols ; i<iLen ; i++ )
	    {
	        $(oSettings.aoColumns[i].nTh).unbind('click');
	        this.oApi._fnSortAttachListener( oSettings, oSettings.aoColumns[i].nTh, i );
	    }
	   
	   
	    /* Fire an event so other plug-ins can update */
	    $(oSettings.oInstance).trigger( 'column-reorder', [ oSettings, {
	        "iFrom": iFrom,
	        "iTo": iTo,
	        "aiInvertMapping": aiInvertMapping
	    } ] );
	   
	    if ( typeof oSettings.oInstance._oPluginFixedHeader != 'undefined' )
	    {
	        oSettings.oInstance._oPluginFixedHeader.fnUpdate();
	    }
	};
	
	
	
	
	/**
	 * ColReorder provides column visiblity control for DataTables
	 * @class ColReorder
	 * @constructor
	 * @param {object} DataTables object
	 * @param {object} ColReorder options
	 */
	ColReorder = function( oTable, oOpts )
	{
	    /* Santiy check that we are a new instance */
	    if ( !this.CLASS || this.CLASS != "ColReorder" )
	    {
	        alert( "Warning: ColReorder must be initialised with the keyword 'new'" );
	    }
	   
	    if ( typeof oOpts == 'undefined' )
	    {
	        oOpts = {};
	    }
	   
	   
	    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	     * Public class variables
	     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	   
	    /**
	     * @namespace Settings object which contains customisable information for ColReorder instance
	     */
	    this.s = {
	        /**
	         * DataTables settings object
	         *  @property dt
	         *  @type     Object
	         *  @default  null
	         */
	        "dt": null,
	       
	        /**
	         * Initialisation object used for this instance
	         *  @property init
	         *  @type     object
	         *  @default  {}
	         */
	        "init": oOpts,
	       
	        /**
	         * Number of columns to fix (not allow to be reordered)
	         *  @property fixed
	         *  @type     int
	         *  @default  0
	         */
	        "fixed": 0,
	       
	        /**
	         * Callback function for once the reorder has been done
	         *  @property dropcallback
	         *  @type     function
	         *  @default  null
	         */
	        "dropCallback": null,
	       
	        /**
	         * @namespace Information used for the mouse drag
	         */
	        "mouse": {
	            "startX": -1,
	            "startY": -1,
	            "offsetX": -1,
	            "offsetY": -1,
	            "target": -1,
	            "targetIndex": -1,
	            "fromIndex": -1
	        },
	       
	        /**
	         * Information which is used for positioning the insert cusor and knowing where to do the
	         * insert. Array of objects with the properties:
	         *   x: x-axis position
	         *   to: insert point
	         *  @property aoTargets
	         *  @type     array
	         *  @default  []
	         */
	        "aoTargets": []
	    };
	   
	   
	    /**
	     * @namespace Common and useful DOM elements for the class instance
	     */
	    this.dom = {
	        /**
	         * Dragging element (the one the mouse is moving)
	         *  @property drag
	         *  @type     element
	         *  @default  null
	         */
	        "drag": null,
	       
	        /**
	         * The insert cursor
	         *  @property pointer
	         *  @type     element
	         *  @default  null
	         */
	        "pointer": null
	    };
	   
	   
	    /* Constructor logic */
	    this.s.dt = oTable.fnSettings();
	    this._fnConstruct();
	   
	    /* Store the instance for later use */
	    ColReorder.aoInstances.push( this );
	    return this;
	};
	
	
	
	ColReorder.prototype = {
	    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	     * Public methods
	     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	   
	    "fnReset": function ()
	    {
	        var a = [];
	        for ( var i=0, iLen=this.s.dt.aoColumns.length ; i<iLen ; i++ )
	        {
	            a.push( this.s.dt.aoColumns[i]._ColReorder_iOrigCol );
	        }
	       
	        this._fnOrderColumns( a );
	    },
	   
	   
	    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	     * Private methods (they are of course public in JS, but recommended as private)
	     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	   
	    /**
	     * Constructor logic
	     *  @method  _fnConstruct
	     *  @returns void
	     *  @private
	     */
	    "_fnConstruct": function ()
	    {
	        var that = this;
	        var i, iLen;
	       
	        /* Columns discounted from reordering - counting left to right */
	        if ( typeof this.s.init.iFixedColumns != 'undefined' )
	        {
	            this.s.fixed = this.s.init.iFixedColumns;
	        }
	       
	        /* Drop callback initialisation option */
	        if ( typeof this.s.init.fnReorderCallback != 'undefined' )
	        {
	            this.s.dropCallback = this.s.init.fnReorderCallback;
	        }
	       
	        /* Add event handlers for the drag and drop, and also mark the original column order */
	        for ( i=0, iLen=this.s.dt.aoColumns.length ; i<iLen ; i++ )
	        {
	            if ( i > this.s.fixed-1 )
	            {
	                this._fnMouseListener( i, this.s.dt.aoColumns[i].nTh );
	            }
	           
	            /* Mark the original column order for later reference */
	            this.s.dt.aoColumns[i]._ColReorder_iOrigCol = i;
	        }
	       
	        /* State saving */
	        this.s.dt.oApi._fnCallbackReg( this.s.dt, 'aoStateSaveParams', function (oS, oData) {
	            that._fnStateSave.call( that, oData );
	        }, "ColReorder_State" );
	       
	        /* An initial column order has been specified */
	        var aiOrder = null;
	        if ( typeof this.s.init.aiOrder != 'undefined' )
	        {
	            aiOrder = this.s.init.aiOrder.slice();
	        }
	       
	        /* State loading, overrides the column order given */
	        if ( this.s.dt.oLoadedState && typeof this.s.dt.oLoadedState.ColReorder != 'undefined' &&
	          this.s.dt.oLoadedState.ColReorder.length == this.s.dt.aoColumns.length )
	        {
	            aiOrder = this.s.dt.oLoadedState.ColReorder;
	        }
	       
	        /* If we have an order to apply - do so */
	        if ( aiOrder )
	        {
	            /* We might be called during or after the DataTables initialisation. If before, then we need
	             * to wait until the draw is done, if after, then do what we need to do right away
	             */
	            if ( !that.s.dt._bInitComplete )
	            {
	                var bDone = false;
	                this.s.dt.aoDrawCallback.push( {
	                    "fn": function () {
	                        if ( !that.s.dt._bInitComplete && !bDone )
	                        {
	                            bDone = true;
	                            var resort = fnInvertKeyValues( aiOrder );
	                            that._fnOrderColumns.call( that, resort );
	                        }
	                    },
	                    "sName": "ColReorder_Pre"
	                } );
	            }
	            else
	            {
	                var resort = fnInvertKeyValues( aiOrder );
	                that._fnOrderColumns.call( that, resort );
	            }
	        }
	    },
	   
	   
	    /**
	     * Set the column order from an array
	     *  @method  _fnOrderColumns
	     *  @param   array a An array of integers which dictate the column order that should be applied
	     *  @returns void
	     *  @private
	     */
	    "_fnOrderColumns": function ( a )
	    {
	        if ( a.length != this.s.dt.aoColumns.length )
	        {
	            this.s.dt.oInstance.oApi._fnLog( this.s.dt, 1, "ColReorder - array reorder does not "+
	                "match known number of columns. Skipping." );
	            return;
	        }
	       
	        for ( var i=0, iLen=a.length ; i<iLen ; i++ )
	        {
	            var currIndex = $.inArray( i, a );
	            if ( i != currIndex )
	            {
	                /* Reorder our switching array */
	                fnArraySwitch( a, currIndex, i );
	               
	                /* Do the column reorder in the table */
	                this.s.dt.oInstance.fnColReorder( currIndex, i );
	            }
	        }
	       
	        /* When scrolling we need to recalculate the column sizes to allow for the shift */
	        if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
	        {
	            this.s.dt.oInstance.fnAdjustColumnSizing();
	        }
	           
	        /* Save the state */
	        this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
	    },
	   
	   
	    /**
	     * Because we change the indexes of columns in the table, relative to their starting point
	     * we need to reorder the state columns to what they are at the starting point so we can
	     * then rearrange them again on state load!
	     *  @method  _fnStateSave
	     *  @param   object oState DataTables state
	     *  @returns string JSON encoded cookie string for DataTables
	     *  @private
	     */
	    "_fnStateSave": function ( oState )
	    {
	        var i, iLen, aCopy, iOrigColumn;
	        var oSettings = this.s.dt;
	
	        /* Sorting */
	        for ( i=0 ; i<oState.aaSorting.length ; i++ )
	        {
	            oState.aaSorting[i][0] = oSettings.aoColumns[ oState.aaSorting[i][0] ]._ColReorder_iOrigCol;
	        }
	
	        aSearchCopy = $.extend( true, [], oState.aoSearchCols );
	        oState.ColReorder = [];
	
	        for ( i=0, iLen=oSettings.aoColumns.length ; i<iLen ; i++ )
	        {
	            iOrigColumn = oSettings.aoColumns[i]._ColReorder_iOrigCol;
	
	            /* Column filter */
	            oState.aoSearchCols[ iOrigColumn ] = aSearchCopy[i];
	
	            /* Visibility */
	            oState.abVisCols[ iOrigColumn ] = oSettings.aoColumns[i].bVisible;
	       
	            /* Column reordering */
	            oState.ColReorder.push( iOrigColumn );
	        }
	    },
	   
	   
	    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	     * Mouse drop and drag
	     */
	   
	    /**
	     * Add a mouse down listener to a particluar TH element
	     *  @method  _fnMouseListener
	     *  @param   int i Column index
	     *  @param   element nTh TH element clicked on
	     *  @returns void
	     *  @private
	     */
	    "_fnMouseListener": function ( i, nTh )
	    {
	        var that = this;
	        $(nTh).bind( 'mousedown.ColReorder', function (e) {
	            e.preventDefault();
	            that._fnMouseDown.call( that, e, nTh );
	        } );
	    },
	   
	   
	    /**
	     * Mouse down on a TH element in the table header
	     *  @method  _fnMouseDown
	     *  @param   event e Mouse event
	     *  @param   element nTh TH element to be dragged
	     *  @returns void
	     *  @private
	     */
	    "_fnMouseDown": function ( e, nTh )
	    {
	        var
	            that = this,
	            aoColumns = this.s.dt.aoColumns;
	       
	        /* Store information about the mouse position */
	        var nThTarget = e.target.nodeName == "TH" ? e.target : $(e.target).parents('TH')[0];
	        var offset = $(nThTarget).offset();
	        this.s.mouse.startX = e.pageX;
	        this.s.mouse.startY = e.pageY;
	        this.s.mouse.offsetX = e.pageX - offset.left;
	        this.s.mouse.offsetY = e.pageY - offset.top;
	        this.s.mouse.target = nTh;
	        this.s.mouse.targetIndex = $('th', nTh.parentNode).index( nTh );
	        this.s.mouse.fromIndex = this.s.dt.oInstance.oApi._fnVisibleToColumnIndex( this.s.dt,
	            this.s.mouse.targetIndex );
	       
	        /* Calculate a cached array with the points of the column inserts, and the 'to' points */
	        this.s.aoTargets.splice( 0, this.s.aoTargets.length );
	       
	        this.s.aoTargets.push( {
	            "x":  $(this.s.dt.nTable).offset().left,
	            "to": 0
	        } );
	       
	        var iToPoint = 0;
	        for ( var i=0, iLen=aoColumns.length ; i<iLen ; i++ )
	        {
	            /* For the column / header in question, we want it's position to remain the same if the
	             * position is just to it's immediate left or right, so we only incremement the counter for
	             * other columns
	             */
	            if ( i != this.s.mouse.fromIndex )
	            {
	                iToPoint++;
	            }
	           
	            if ( aoColumns[i].bVisible )
	            {
	                this.s.aoTargets.push( {
	                    "x":  $(aoColumns[i].nTh).offset().left + $(aoColumns[i].nTh).outerWidth(),
	                    "to": iToPoint
	                } );
	            }
	        }
	       
	        /* Disallow columns for being reordered by drag and drop, counting left to right */
	        if ( this.s.fixed !== 0 )
	        {
	            this.s.aoTargets.splice( 0, this.s.fixed );
	        }
	       
	        /* Add event handlers to the document */
	        $(document).bind( 'mousemove.ColReorder', function (e) {
	            that._fnMouseMove.call( that, e );
	        } );
	       
	        $(document).bind( 'mouseup.ColReorder', function (e) {
	            that._fnMouseUp.call( that, e );
	        } );
	    },
	   
	   
	    /**
	     * Deal with a mouse move event while dragging a node
	     *  @method  _fnMouseMove
	     *  @param   event e Mouse event
	     *  @returns void
	     *  @private
	     */
	    "_fnMouseMove": function ( e )
	    {
	        var that = this;
	       
	        if ( this.dom.drag === null )
	        {
	            /* Only create the drag element if the mouse has moved a specific distance from the start
	             * point - this allows the user to make small mouse movements when sorting and not have a
	             * possibly confusing drag element showing up
	             */
	            if ( Math.pow(
	                Math.pow(e.pageX - this.s.mouse.startX, 2) +
	                Math.pow(e.pageY - this.s.mouse.startY, 2), 0.5 ) < 5 )
	            {
	                return;
	            }
	            this._fnCreateDragNode();
	        }
	       
	        /* Position the element - we respect where in the element the click occured */
	        this.dom.drag.style.left = (e.pageX - this.s.mouse.offsetX) + "px";
	        this.dom.drag.style.top = (e.pageY - this.s.mouse.offsetY) + "px";
	       
	        /* Based on the current mouse position, calculate where the insert should go */
	        var bSet = false;
	        for ( var i=1, iLen=this.s.aoTargets.length ; i<iLen ; i++ )
	        {
	            if ( e.pageX < this.s.aoTargets[i-1].x + ((this.s.aoTargets[i].x-this.s.aoTargets[i-1].x)/2) )
	            {
	                this.dom.pointer.style.left = this.s.aoTargets[i-1].x +"px";
	                this.s.mouse.toIndex = this.s.aoTargets[i-1].to;
	                bSet = true;
	                break;
	            }
	        }
	       
	        /* The insert element wasn't positioned in the array (less than operator), so we put it at
	         * the end
	         */
	        if ( !bSet )
	        {
	            this.dom.pointer.style.left = this.s.aoTargets[this.s.aoTargets.length-1].x +"px";
	            this.s.mouse.toIndex = this.s.aoTargets[this.s.aoTargets.length-1].to;
	        }
	    },
	   
	   
	    /**
	     * Finish off the mouse drag and insert the column where needed
	     *  @method  _fnMouseUp
	     *  @param   event e Mouse event
	     *  @returns void
	     *  @private
	     */
	    "_fnMouseUp": function ( e )
	    {
	        var that = this;
	       
	        $(document).unbind( 'mousemove.ColReorder' );
	        $(document).unbind( 'mouseup.ColReorder' );
	       
	        if ( this.dom.drag !== null )
	        {
	            /* Remove the guide elements */
	            document.body.removeChild( this.dom.drag );
	            document.body.removeChild( this.dom.pointer );
	            this.dom.drag = null;
	            this.dom.pointer = null;
	           
	            /* Actually do the reorder */
	            this.s.dt.oInstance.fnColReorder( this.s.mouse.fromIndex, this.s.mouse.toIndex );
	           
	            /* When scrolling we need to recalculate the column sizes to allow for the shift */
	            if ( this.s.dt.oScroll.sX !== "" || this.s.dt.oScroll.sY !== "" )
	            {
	                this.s.dt.oInstance.fnAdjustColumnSizing();
	            }
	           
	            if ( this.s.dropCallback !== null )
	            {
	                this.s.dropCallback.call( this );
	            }
	           
	            /* Save the state */
	            this.s.dt.oInstance.oApi._fnSaveState( this.s.dt );
	        }
	    },
	   
	   
	    /**
	     * Copy the TH element that is being drags so the user has the idea that they are actually
	     * moving it around the page.
	     *  @method  _fnCreateDragNode
	     *  @returns void
	     *  @private
	     */
	    "_fnCreateDragNode": function ()
	    {
	        var that = this;
	       
	        this.dom.drag = $(this.s.dt.nTHead.parentNode).clone(true)[0];
	        this.dom.drag.className += " DTCR_clonedTable";
	        while ( this.dom.drag.getElementsByTagName('caption').length > 0 )
	        {
	            this.dom.drag.removeChild( this.dom.drag.getElementsByTagName('caption')[0] );
	        }
	        while ( this.dom.drag.getElementsByTagName('tbody').length > 0 )
	        {
	            this.dom.drag.removeChild( this.dom.drag.getElementsByTagName('tbody')[0] );
	        }
	        while ( this.dom.drag.getElementsByTagName('tfoot').length > 0 )
	        {
	            this.dom.drag.removeChild( this.dom.drag.getElementsByTagName('tfoot')[0] );
	        }
	       
	        $('thead tr:eq(0)', this.dom.drag).each( function () {
	            $('th:not(:eq('+that.s.mouse.targetIndex+'))', this).remove();
	        } );
	        $('tr', this.dom.drag).height( $('tr:eq(0)', that.s.dt.nTHead).height() );
	       
	        $('thead tr:gt(0)', this.dom.drag).remove();
	       
	        $('thead th:eq(0)', this.dom.drag).each( function (i) {
	            this.style.width = $('th:eq('+that.s.mouse.targetIndex+')', that.s.dt.nTHead).width()+"px";
	        } );
	       
	        this.dom.drag.style.position = "absolute";
	        this.dom.drag.style.top = "0px";
	        this.dom.drag.style.left = "0px";
	        this.dom.drag.style.width = $('th:eq('+that.s.mouse.targetIndex+')', that.s.dt.nTHead).outerWidth()+"px";
	       
	       
	        this.dom.pointer = document.createElement( 'div' );
	        this.dom.pointer.className = "DTCR_pointer";
	        this.dom.pointer.style.position = "absolute";
	       
	        if ( this.s.dt.oScroll.sX === "" && this.s.dt.oScroll.sY === "" )
	        {
	            this.dom.pointer.style.top = $(this.s.dt.nTable).offset().top+"px";
	            this.dom.pointer.style.height = $(this.s.dt.nTable).height()+"px";
	        }
	        else
	        {
	            this.dom.pointer.style.top = $('div.dataTables_scroll', this.s.dt.nTableWrapper).offset().top+"px";
	            this.dom.pointer.style.height = $('div.dataTables_scroll', this.s.dt.nTableWrapper).height()+"px";
	        }
	   
	        document.body.appendChild( this.dom.pointer );
	        document.body.appendChild( this.dom.drag );
	    }
	};
	
	
	
	
	
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Static parameters
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	
	/**
	 * Array of all ColReorder instances for later reference
	 *  @property ColReorder.aoInstances
	 *  @type     array
	 *  @default  []
	 *  @static
	 */
	ColReorder.aoInstances = [];
	
	
	
	
	
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Static functions
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	
	/**
	 * Reset the column ordering for a DataTables instance
	 *  @method  ColReorder.fnReset
	 *  @param   object oTable DataTables instance to consider
	 *  @returns void
	 *  @static
	 */
	ColReorder.fnReset = function ( oTable )
	{
	    for ( var i=0, iLen=ColReorder.aoInstances.length ; i<iLen ; i++ )
	    {
	        if ( ColReorder.aoInstances[i].s.dt.oInstance == oTable )
	        {
	            ColReorder.aoInstances[i].fnReset();
	        }
	    }
	};
	
	
	
	
	
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Constants
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	
	/**
	 * Name of this class
	 *  @constant CLASS
	 *  @type     String
	 *  @default  ColReorder
	 */
	ColReorder.prototype.CLASS = "ColReorder";
	
	
	/**
	 * ColReorder version
	 *  @constant  VERSION
	 *  @type      String
	 *  @default   As code
	 */
	ColReorder.VERSION = "1.0.6";
	ColReorder.prototype.VERSION = ColReorder.VERSION;
	
	
	
	
	
	/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
	 * Initialisation
	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
	
	/*
	 * Register a new feature with DataTables
	 */
	if ( typeof $.fn.dataTable == "function" &&
	     typeof $.fn.dataTableExt.fnVersionCheck == "function" &&
	     $.fn.dataTableExt.fnVersionCheck('1.9.0') )
	{
	    $.fn.dataTableExt.aoFeatures.push( {
	        "fnInit": function( oDTSettings ) {
	            var oTable = oDTSettings.oInstance;
	            if ( typeof oTable._oPluginColReorder == 'undefined' ) {
	                var opts = typeof oDTSettings.oInit.oColReorder != 'undefined' ?
	                    oDTSettings.oInit.oColReorder : {};
	                oTable._oPluginColReorder = new ColReorder( oDTSettings.oInstance, opts );
	            } else {
	                oTable.oApi._fnLog( oDTSettings, 1, "ColReorder attempted to initialise twice. Ignoring second" );
	            }
	           
	            return null; /* No node to insert */
	        },
	        "cFeature": "R",
	        "sFeature": "ColReorder"
	    } );
	}
	else
	{
	    alert( "Warning: ColReorder requires DataTables 1.9.0 or greater - www.datatables.net/download");
	}
	
	})(jQuery, window, document);